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QUANTUM COMPUTERS

QUANTUM COMPUTERS. ELG 7133 "Technology of Opto- and Electronic devices for Telecom applications“ by Tolga Kurt 3124577. Quantum Physics. Quantum Numbers 1st - Principle QN n 2nd - Orbital QN l 3rd - Magnetic QN ml 4th - Spin QN ms Superposition principle-Schrödinger's cat .

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QUANTUM COMPUTERS

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  1. QUANTUM COMPUTERS ELG 7133 "Technology of Opto- and Electronic devices for Telecom applications“ by Tolga Kurt 3124577 Quantum Computers

  2. Quantum Physics • Quantum Numbers • 1st - Principle QNn • 2nd - Orbital QNl • 3rd - Magnetic QNml • 4th - Spin QNms • Superposition principle-Schrödinger's cat Quantum Computers

  3. Quantum Computers • Need for faster and smaller computers • Scaling limitations in the semi-conductor tech • The requirement of new algorithms for harder problems (such as large number factorization problem) • The need for parallel operation Quantum Computers

  4. Superposition Principle • Bit vs. Qubit • Probabilistic Calculation • Correct answers survive, wrong answers cancel each other. • Shor’s Algorithm for large number factorization problem. Oxford Quantum Computation Group. Quantum Computers

  5. Parallel Computation Quantum Computers

  6. SINGLE PHOTON ON DEMAND • Polarization of photons cannot be measured without disturbing the states • However if there is another photon information can be stolen Quantum Computers

  7. QUANTUM ENTANGLEMENT • Teleportation • Heisenberg Uncertainty Principle • “That one body may act upon another at a distance through a vacuum without the mediation of anything else…is to me so great an absurdity, that I believe no man, who has in philosophical matters a competent faculty for thinking, can ever fall into” Isaac Newton • Communicating between galaxies become easier. Quantum Computers

  8. Quantum ECC and Cryptology • Detection of polarization (0-90, 45-135) • Correlated particle pair generation • ECC without looking at the data • Very long codes, still looking for efficient codes (7,1) Quantum Computers

  9. Quantum Computer Architecture Quantum Computers

  10. Combining Optics and Solid State Electronics with Quantum Theory • Over $100b invested on semiconductors • Model of Bruce Kane(Univ. South Wales ,Sydney) • Electron relaxation times • P doped Si used but also GaAs is a candidate. • Distance between gates 100 A • Gates control not the current, state of electrons. • Optical systems yet to improve • Nonlinear optics, Cavity quantum electrodynamics Quantum Computers

  11. Conclusions • New information theory, new communication (teleportation!) theory, and new algorithms are needed • New scientist and engineers needed • Electrons and photons do not have commonsense • “It’s end of the world as we know it” Quantum Computers

  12. References • Explorations in quantum computing / by Colin P. Williams and Scott H. Clearwater. Santa Clara, Calif. : TELOS, 1997 • An introduction to quantum computing algorithms / Arthur O. Pittenger. Boston : Birkhäuser, c2000. • Quantum computing and communications / Michael Brooks (ed.). London ; New York : Springer, 1999 • Introduction to quantum computers / Gennady P. Berman ... [et al.]. Singapore ; River Edge, NJ : World Scientific, c1998 • M. Oskin, F. T. Chong, I. L. Chuang, “A practical architecture for reliable quantum computers”, IEEEComputer, pp. 79-87,Jan. 2002 • www.qubit.org • http://www.iro.umontreal.ca/labs/theorique/en/ Quantum Computers

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